In a food processor, pulse the butter, shortening, flour, salt and sugar until the butter is distributed evenly.
Slowly add in the 4 tbsp of ice water. The dough will be shaggy.
Dump out onto the counter and knead by hand until the dough comes together.
Wrap in plastic wrap and refrigerate for 30 minutes before rolling out.
When rolling it out, roll out on parchment paper. Start in the center and roll away from you, turning the parchment paper after each roll. This helps to roll the pie crust into a circle instead of a rectangle.
When the dough has been rolled out enough, place the pie plate upside down on the pie crust. Slip your hand under the parchment paper and then flip the pie plate over, bringing the crust with it.
Gently remove the parchment paper, trim and crimp the edges.
Bake at 325° for 15 minutes to pre-bake the pie crust, if that is what is needed for your pie recipe.